Finding the Fourth Proportional to 187.96, 281.78 and 79.68
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Solution
The fourth proportional to 187.96, 281.78 and 79.68 is: 119.45
Step by Step Solution
- Step 1: Write the proportion equation
187.96 : 281.78 = 79.68 : x - Step 2: Convert to fraction form
187.96/281.78 = 79.68/x - Step 3: Cross multiply
187.96x = 281.78 × 79.68 - Step 4: Simplify right side
187.96x = 22,452.23 - Step 5: Solve for x
x = 22,452.23/187.96 - Step 6: Final answer
x = 119.45
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.